Abstract
Electrochemical techniques have been generating great interest due to their wide range of applications and their ease of use. For this reason, in recent years’ electrochemical techniques such as cyclic voltammetry, anodic voltametric stripping, chronoamperometry and linear voltammetry have been developed. Linear voltammetry is one of the most widely used electrochemical techniques, where a voltage range is applied to a solution with the analyte and then current data is collected as a response. For this, an electrochemical cell with its 3 electrodes (working electrode, counter electrode, reference electrode) and a device for voltage control and current evaluation (potentiostat) is used. A potentiostat is an electronic device that allows the voltage or current to be regulated according to the electrochemical technique to be performed. The devices are usually very expensive due to their high precision, for this reason, our project is focused on the development of a low cost system that allows us to recognize redox systems by using linear voltammetry. our potentiostat system was able to differentiate in a redox salt (sodium chloride) from the support electrolytes (chlorohydric acid, nitric acid, sulfuric acid), allowing us to evaluate redox behavior at a cost of less than $ 40.
Highlights
In last years, the electrochemical techniques have had a lot growing due to the increase of electronic precision, the electrochemical techniques have taken on great importance due to widely range to applications
Linear voltammetry is one of the most widely used electrochemical techniques, where a voltage range is applied to a solution with the analyte and current data is collected as a response
The devices are usually very expensive due to their high precision, for this reason, our project is focused on the development of a low cost system that allows us to recognize redox systems by using linear voltammetry. our potentiostat system was able to differentiate in a redox salt from the support electrolytes, allowing us to evaluate redox behavior at a cost of less than $ 40
Summary
The electrochemical techniques have had a lot growing due to the increase of electronic precision, the electrochemical techniques have taken on great importance due to widely range to applications. A potentiostat allows us to analyze and monitor redox mechanisms resulting from chemical reactions [1] These chemical reactions are generated from the application of a range of voltages that is carefully controlled by the potentiostat to obtain current data. A high precision and quality potentiostat can to cost more than $10,000 and prevent the popularization of these methodologies in low-cost laboratories resources in developing countries [3] For this reason, a number of researches are being carried out to develop low-cost potentiometers for a wide range of applications, from the implementation of portable devices for the diagnosis or recognition of pathogens of importance in public health and food safety to the development of miniaturized high precision systems for metal traceability [4][11]. Tests were carried out with three different electrolytes (nitric acid, sulphuric acid and hydrochloric acid) and redox species (potassium chloride, sodium chloride and potassium ferrocyanide) to observe the behavior of the circuit, with which results were obtained that were compared with a commercial potentiostat system (PalmSens), we analyzed and compared the characterization curves that allowed us to demonstrate that the circuit allows us to recognize the electrochemical behavior of redox species in electrolyte solutions, being useful for the respective analysis
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